CVE-2026-34371

LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal

State: Published
Severity: 6.3 Medium
Published: Apr 7, 2026
Updated: Apr 8, 2026
Reserved: Mar 27, 2026

Description

LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
LibreChatdanny-avila	< 0.8.4Affected

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-r67f-6692

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